Quarterly report pursuant to Section 13 or 15(d)

Schedule of Related Party Transactions, by Related Party (Details)

v3.8.0.1
Schedule of Related Party Transactions, by Related Party (Details) - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Sep. 30, 2017
Sep. 30, 2016
Sep. 30, 2017
Sep. 30, 2016
Related Party Transaction [Line Items]        
Management fees $ 13,276 $ 11,387 $ 36,518 $ 35,268
PRCM Advisers LLC [Member]        
Related Party Transaction [Line Items]        
Management fees 10,147 11,387 $ 33,284 35,268
Percent per annum of equity used to calculate management fees     1.50%  
Direct and allocated costs incurred by manager 4,790 6,259 $ 18,775 19,086
Pine River Capital Management L.P. [Member]        
Related Party Transaction [Line Items]        
Management fees 3,234      
Percent per annum of equity used to calculate management fees     1.50%  
Second Restated 2009 Equity Incentive Plan [Member]        
Related Party Transaction [Line Items]        
Compensation costs related to restricted common stock 3,488 $ 3,468 $ 11,700 $ 11,223
Granite Point Mortgage Trust Inc. 2017 Equity Incentive Plan [Member]        
Related Party Transaction [Line Items]        
Compensation costs related to restricted common stock $ 687   $ 687